https://bugs.freedesktop.org/show_bug.cgi?id=91375
--- Comment #4 from Raman Gupta rocketraman@gmail.com --- I just got this error. My X server froze, though the mouse was still active. When I switched away to a different VT and then switched back, the screens were black.
Here are some more reports of the same problem: https://bbs.archlinux.org/viewtopic.php?id=179906
My environment is Fedora 21 with the latest packages:
# uname -a Linux edison 4.1.6-100.fc21.x86_64 #1 SMP Mon Aug 17 22:20:37 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux
Mesa 10.4.7
I will attach the Xorg log and kernel output from journalctl.